<template>
    <div>
         <!-- 面包屑 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
       <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 750px;height:400px;"></div>

    </el-card>
    </div>
</template>

<script>
//1.引入 
import echarts from 'echarts'
import _ from 'lodash'
export default {
    data(){
        return{
        options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
        }
    },
    created(){

    },
    //此时，页面上的元素，已经渲染完毕了
   async mounted(){
        //3.基于准备好的dom，初始化echarts实列
        var myChart = echarts.init(document.getElementById('main'));
      //连接后台数据
        const {data:res} = await this.$http.get('reports/type/1')
        if(res.meta.status !== 200)
            return this.$message.error('获取列表数据失败')
        
      const result = _.merge(res.data,this.options)
      //4.准备数据和配置项
        
        // 5.使用刚指定的配置项和数据显示图表。
        myChart.setOption(result);
    },
    methods:{

    },
}
</script>

<style lang="stylus" scoped>

</style>